Enviaments recents

  • Direct growth of 2D and 3D graphene nano-structures over large glass substrates by tuning a sacrificial Cu-template layer 

    Marchena, Miriam; Song, Zhen; Senaratne, Wageesha; Li, Connie; Liu, Xinyuan; Baker, David; Canet Ferrer, Josep; Mazumder, Prantik; Soni, Kamal; Lee, Robert; Pruneri, Valerio (IOP, 2017-03-28)
    Article
    Accés obert
    We demonstrate direct growth of two-dimensional (2D) and three-dimensional (3D) graphene structures on glass substrates. By starting from catalytic copper nanoparticles of different densities and using chemical vapour ...
  • Tunable complete optical absorption in multilayer structures including 𝐆𝐞𝟐𝐒𝐛𝟐𝐓𝐞𝟓 without lithographic patterns 

    Mkhitaryan, Vahagn K.; Ghosh, Dhriti S.; Rudé, Miquel; Canet-Ferrer, Josep; Maniyara, Rinu Abraham; Gopalan, Kavitha K.; Pruneri, Valerio (Wiley, 2017-01-04)
    Article
    Accés restringit per política de l'editorial
    Controlling the spectral transmission, reflection, and absorption properties of optical structures is of great interest for many applications in photonics. Particularly, perfect absorbers over a wide frequency (wavelength) ...
  • An antireflection transparent conductor with ultralow optical loss (o2 %) and electrical resistance (o6O 2) 

    Maniyara, Rinu Abraham; Mkhitaryan, Vahagn K.; Chen, Tong Lai; Ghosh, Dhriti Sundar; Pruneri, Valerio (Nature, 2016-12-19)
    Article
    Accés obert
    Transparent conductors are essential in many optoelectronic devices, such as displays, smart windows, light-emitting diodes and solar cells. Here we demonstrate a transparent conductor with optical loss of B1.6%, that ...
  • Low temperature direct growth of graphene patterns on flexible glass substrates catalysed by a sacrificial ultrathin Ni film 

    Marchena, Miriam; Janner, Davide; Chen, Tong Lai; Finazzi, Vittoria; Pruneri, Valerio (OSA, 2016-08-01)
    Article
    Accés obert
    Direct deposition of graphene on substrates would avoid costly, time consuming and defect inducing transfer techniques. In this paper we used ultrathin films of Ni, with thickness ranging from 5 to 50 nm, as a catalytic ...
  • Time-domain separation of optical properties from structural transitions in resonantly bonded materials 

    Waldecker, Lutz; Miller, Timothy A.; Rudé, Miquel; Bertoni, Roman; Osmond, Johann; Simpson, Robert E.; Ernstorfer, Ralph; Wall, Simon (Nature Publishing Group, 2015-07-27)
    Article
    Accés obert
    The extreme electro-optical contrast between crystalline and amorphous states in phase-change materials is routinely exploited in optical data storage1 and future applications include universal memories2, flexible displays3, ...
  • Mid-Infrared Plasmonic Biosensing with Graphene 

    Rodrigo, Daniel; Limaj, Odeta; Janner, Davide; Etezadi, Dordaneh; García de Abajo, Francisco Javier; Pruneri, Valerio; Altug, Hatice (Science, 2015-07-10)
    Article
    Accés obert
    Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric-size molecules. We exploit the ...
  • Passive Decoy-State Quantum Key Distribution with Coherent Light 

    Curty, Marcos; Jofre, Marc; Pruneri, Valerio; Mitchell, Morgan W. (MDPI, 2015-06-12)
    Article
    Accés obert
    Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ...
  • Resonant Visible Light Modulation with Graphene 

    Yu, Renwen; Pruneri, Valerio; García de Abajo, Francisco Javier (ACS, 2015-03-13)
    Article
    Accés obert
    Fast modulation and switching of light at visible and near-infrared (vis–NIR) frequencies are of utmost importance for optical signal processing and sensing technologies. No fundamental limit appears to prevent us from ...
  • Enhancement of the sensitivity of a temperature sensor based on fiber Bragg gratings via weak value amplification 

    Salazar-Serrano, L. J.; Barrera, D.; Amaya, W.; Sales, S.; Pruneri, Valerio; Capmany, J.; Pérez Torres, Juan (OSA, 2015-09-01)
    Article
    Accés obert
    We present a proof-of-concept experiment aimed at increasing the sensitivity of temperature sensors implemented with Fiber Bragg gratings by making use of a weak value amplification scheme. The technique requires only ...
  • Active Control of Surface Plasmon Waveguides with a Phase Change Material 

    Rudé, Miquel; Simpson, Robert E.; Quidant, Romain; Pruneri, Valerio; Renger, Jan (2015-05-25)
    Article
    Accés obert
    The ability to manipulate light propagation at the nanoscale is of vital importance for future integrated photonic circuits. In this work we exploit the high contrast in the optical properties of the phase change material ...

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